Impact of Power-Electronic Sources on Transmission Line Ground Fault Protection
| Autor: | Mukesh Nagpal, C.F. Henville |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Engineering
Wind power business.industry Residual-current device 020209 energy Electrical engineering Energy Engineering and Power Technology 02 engineering and technology Converters Turbine law.invention Electric power transmission law Transmission line 0202 electrical engineering electronic engineering information engineering Electronic engineering Electrical and Electronic Engineering business Power-system protection Transformer |
| Zdroj: | IEEE Transactions on Power Delivery. 33:62-70 |
| ISSN: | 1937-4208 0885-8977 |
| DOI: | 10.1109/tpwrd.2017.2709279 |
| Popis: | Power-electronic sources, such as Type 3 wind turbine generators and static synchronous compensators (STATCOM), interface to the grid through, partial- or full-scale, and power converters that have inherently fast switching capability to control their output current during short circuits. The short-circuit current is a function of the specific converter control algorithm and differs significantly from the conventional rotating machine sources without converter interfaces. Therefore, if a transmission-line protection scheme is designed for conventional sources, (not taking into account these differences in short-circuit current characteristics), reliability can be at risk. Using real-life short-circuit currents on lines supplied by sources having a power converter interface, this paper illustrates the reliability risk to conventional line protection schemes, in particular, to those which use negative-sequence quantities for the detection of unbalanced faults. This paper discusses the protection schemes, adopted by BC Hydro–a large Canadian Electric Utility, for transmission lines interconnecting Type 3 wind turbine and STATCOM sources. Their application for ground faults is independent of the converter control algorithm as long as the source is interconnected to the grid via a transformer which is a source of zero-sequence current. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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